Concept:A referendum is a direct vote by the people on a specific political issue, often requiring a simple "Yes" or "No" response.
Explanation:The question describes a situation where citizens vote "Yes" or "No" on a particular political issue.
This is not merely public opinion, which is an informal measure of attitudes without a formal ballot.
Gerrymandering refers to manipulating electoral boundaries for political advantage, and suffrage means the right to vote in general elections.
A referendum, however, is the specific instrument that puts a single proposal directly to the entire electorate for approval or rejection.
In many countries, it is also called a plebiscite or a ballot question.
Since the question asks for the term that exactly matches a "Yes" or "No" vote on a specific issue, the correct option is referendum.
Answer:A. referendum